64431120 has 160 divisors (see below), whose sum is σ = 218236032. Its totient is φ = 15630336.

The previous prime is 64431083. The next prime is 64431121. The reversal of 64431120 is 2113446.

It is not an unprimeable number, because it can be changed into a prime (64431121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 333744 + ... + 333936.

Almost surely, 2^64431120 is an apocalyptic number.

64431120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64431120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109118016).

64431120 is an abundant number, since it is smaller than the sum of its proper divisors (153804912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64431120 is a wasteful number, since it uses less digits than its factorization.

64431120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 64431120 is about 8026.8997751311. The cubic root of 64431120 is about 400.8961574220.

Adding to 64431120 its reverse (2113446), we get a palindrome (66544566).

The spelling of 64431120 in words is "sixty-four million, four hundred thirty-one thousand, one hundred twenty".